To FlamesAddition's point, one thing to not forget here is that if we find life (let alone intellectual life) in other parts of the galaxy, it may just be remnants or what once existed. So many variables in planetary existence are at play. We should be incredibly joyous to find any sign - whether it's tiny microbial life that existed millions of years ago or human-like dopplegangers that may exist today.
If there was even a shred of evidence of life on mars existing at one point and its found during our lifetime, that would be monumental news that shakes our belief system about life to the core. Would love to see it.
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